Metallic bonding: Bonding structure and the properties of matter: Chemistry: GCSE (9:1) Diagram

• Term

  Delocalised electronsDefinitionan electron that is able to move freely throughout a structureLocation
• Term

  Positive metal ionsDefinitionMetal atoms that have lost their outer electronsLocation
• Lattice


  Regular arrangement of particles.
• Giant structure


  A huge 3D network of atoms or ions
• Electrostatic forces of attraction


  Strong forces of attraction between oppositely charged particles
• Metallic bonding

  A lattice of positive metal ions surrounded by delocalised outer electrons, held together by strong electrostatic forces of attraction
• Melting and boiling points of metallic substances

  high
• Reason for metals high melting and boiling points

  Strong electrostatic forces between positive metal ions and negative delocalised electrons
• Reason for metals being malleable

  Layers of metal ions can slide over each other

  
• Reason alloys are harder than pure metals


  Different sized atoms disrupt the layers of ions, preventing layers from sliding